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pressure o idation autoclave au

  • Pressure Oxidation Leaching Process

    Batch Autoclave Laboratory Procedures: The vessel used for the laboratory pressure oxidation process was a twoliter Parr titanium autoclave with dual impellersIt was heated and cooled externally and was pressurized with commercialgrade oxygen A positive bleed of offgas was maintained in each test; the rate was measured in the offgas after the steam was removedThis paper reviews the various processes successfully in operation to treat refractory gold ores and describes in detail the alkaline pressure oxidation circuit operating at the Barrick Mercur Mine, Utah, USA, on car bonaceous/sulphide refractory ore and the acidic pressure oxidation circuit operating at the Barrick Goldstrike Mine, near Carlin, Nevada, USA, on sulphideBarrick Gold Autoclaving Processes AusIMM

  • PRESSURE OXIDATION OF REFRACTORY GOLD ORES: THE

    Pressure Oxidation Pressure oxidation is employed to liberate gold and silver in refractory sulfide concentrates often and ores The main pressure oxidation products from iron sulfide minerals are sulfuric acid (and metal sulfates) and hematite Depending on the conditions within the autoclave, acid containing iron compounds can be formedThe pressureoxidation and airseparationunit process areas were delivered on time and on budget despite that logistical challenges; Managed the transportation and logistics of the large pressure oxidation (autoclave) vessels and oxygen plant equipment, including a 120 km, 18day, crosscountry trek to the mine sitePueblo Viejo – Pressure Oxidation and Air Separation Project

  • Pressure Oxidation Caldera Engineering

    Overview Pressure Oxidation (POX) is a process used to extract gold, copper, zinc, molybdenum, and uranium from refractory ore bodies The POX process utilizes elevated temperatures (roughly 230 degrees Celsius), elevated pressures (roughly 35 bar or 510 psi), and oxygen to liberate the minerals from refractory oresPressure Oxidation is a process for extracting gold from refractory ore The most common refractory ores are pyrite and arsenopyrite, which are sulfide ores that trap the gold within themRefractory ores require pretreatment before the gold can be adequately extracted The pressure oxidation process is used to prepare such ores for conventional gold extractionPressure oxidation Wikipedia

  • pressure oxidation autoclave, pressure oxidation autoclave

    Alibaba offers 69 pressure oxidation autoclave products About 724% of these are Sterilization Equipments A wide variety of pressure oxidation autoclave options are available to you,wwwoutotecwwwoutotec

  • PAI Autoclave Circuit Training

    Jan 08, 2016· In this training module, we'll cover the workings of an autoclave circuit that's designed to oxidize finely ground refractory gold ore so that it's suitable for conventional cyanide leaching WeNevertheless, the pressure oxidation of double refractory materials containing carbonaceous matter in addition to sulfides results in substantial gold losses due to autoclave pregrobbingPressure oxidation of double refractory gold concentrates

  • High Pressure Acid Leach and Pressure Oxidation | Caldera

    If you are designing or operating an HPAL, POX, or other pressure hydrometallurgy plant and have questions about pressure letdown equipment, please call us at +1 8013562862 us and one of our engineers will review your questions and concerns and get back to you within 24hoursAutoclave Pressure Oxidation (POx) Autoclave – POx Valve Number Valve Description Design Temperature Design Pressure Pipe Size Recommended Valve1 ° F ° C psi (g) kPa (g) inches dn CSeries ISOLATOR 20 1 Steam Isolation – Secondary 530 277 1,500 103 1 – 2 25 – 50Autoclave DIAGRAM Pressure Oxidation (POx)

  • Autoclave Australia See our Range of Autoclave Products

    Australia designed with parts and electronics made in Germany, Italy, and Japan Autoclave Australia offers you 8 liters to 29 liters fully automatic benchtop autoclaves with the preset program at a competitive price with warranty and us providing training and support to your teamNevertheless, the pressure oxidation of double refractory materials containing carbonaceous matter in addition to sulfides results in substantial gold losses due to autoclave pregrobbingPressure oxidation of double refractory gold concentrates

  • Valves for autoclaves – pressure oxidation ( POX)

    2911/3/2 Valves for autoclaves – pressure oxidation (POX ) 2 APPLICATION REPORT 9/18 Process applications Autoclave POX operation includes several different types of valves, such as slurry feed and discharge, pump isolation, depressurization, steam supply and steam drum isolation asPressure oxidation (POX), high pressure oxidation (HiPOX) and ACTIVOX autoclave leaching are viable industrystandard technologies used to recover gold and other accessory metals The process is particularly well suited for treating refractory gold ores, whichPressure Oxidation | Mining | SGS

  • Autoclave Pressure Oxidation Gold Au Grinding Mill China

    Autoclave Pressure Oxidation Gold Au Grinding Mill China Roasting is the only commercialised process in zimbabwe for the pretreatment of refractory gold feedstocks for the subsequent cyanidation leachinghis process results in only about 75 gold recovery and is characterised by high gold values in the residue pressure oxidation process in an autoclave has been evaluated as an alternativeTitanium Internals in Refractory Lined Pressure Oxidation Autoclaves Author: Franceschini, M Author: Ugarenko, C Hatch Ltd Autoclave Technology, Sr Piping Engineer Hatch Ltd Autoclave Technology, Welding Technologist CoAuthor: Gothard, S WE Smith Engineering Pry Ltd, General Manager 4 Bending the 10 mm Titanium Gr 2 to a 50 mmTitanium Internals in Refractory Lined Pressure Oxidation

  • (PDF) Alkaline Pressure Oxidation of a GoldBearing

    Alkaline pressure oxidation at 160°C, 2413 kPa O2, and 2 M NaOH resulted in about 98% sulfur oxidation and 86% arsenic dissolution Cyanidation of the leach residue resulted in 82% Au extractionin Australia and New Caledonia and the most recent plant, Ambatovy, in Madagascar Sulfide Pressure Oxidation Pressure leaching of sulfide ores is complicated by many items such as sulfur viscosity and the passivation of reactive surfaces “Low” temperature conditions (100o C to 140o C) are generallyPRESSURE LEACHING RPMGlobal

  • Stabilization of supersonic vent gas from autoclave

    STABILIZATION OF SUPERSONIC VENT GAS FROM AUTOCLAVE PRESSURE OXIDATION 81 choked (ie Ma = 1) Due to model limitations phase change has been neglected Phase change is an important phenomenon near the shock wave where the temperature decreases dramatically Although the temperature is expected to drop below 0°C in a small region justAug 20, 2017· A disadvantage of pressure oxidation is that any silver in the feed material will often react to form silver jarosite inside the autoclave, making it difficult and expensive to recover the silverWhat is PRESSURE OXIDATION? What does PRESSURE OXIDATION

  • Autoclave Standard Operating Procedure NDSU

    • Run the autoclave at a chamber temperature of 121°C for 60 minutes*, using a dry cycle run *121°C is a standard temperature for autoclave operation, and generally achieved when chamber pressure is 1516 psi However, this pressure is dependent upon altitude At higher altitudes, the pressure must be increased to achieve 121°CSGS MINERALS SERVICES – T3 SGS 174 092013 PRESSURE LEACHING CAPABILITIES Pressure leaching is a well established hydrometallurgical processing alternative for gold, nickel, PGE and base metal ores SGS has been active in this area since 1985, developing flowsheets and running integrated pilot plants in support of bankable feasibility studiesSGS MINERALS SERVICES – T3 SGS 174 092013

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